Warren Buffett's Berkshire Hathaway bought stock in Google-parent Alphabet during the third quarter.Warren Buffett's Berkshire Hathaway (BRK.A 1.29%) (BRK.B 1.17%) had about $267 billion invested across 41 U.S. stocks as of the third quarter. Those totals changed very little from the previous quarter, but Buffett (and his fellow investment managers) made some trades worth exploring:Berkshire sold 41.7 million shares of Apple (AAPL +0.34%). it remains the largest holding at 21% of the portfolio, but Buffett ...